I suggest taking a look at this project: https://www.rockraidersunited.com/topic/8105-ogel-island-multiplayer-rpsandboxminigame-game/?do=findComment&comment=134485
Which is somewhat far along, it's still in development, he just rarely posts updates here since creating a discord.
LEGO & HVS Devs has been contacted countless times regarding remakes and I'm sure they probably have a template reply by now. You won't get official approval to make it, sorry. Many people have tried and failed to get anywhere with their remakes. You will need a LOT of time, be self-motivated and almost all the skills to undertake this by yourself if you intend to get anywhere with this. Not being harsh, this is just how it is.